yii2 with的回调函数中参数使用

 public function userPageList($where,$order="id desc",$cityName=""){
        if(!empty($cityName)){
            global $cName;//定义
            $cName = $cityName;//赋值
            $query = User::find()->where($where)->innerJoinWith([
                "userInfo"=>function($q){
                    global $cName;//引用
                    $q->andWhere(["like","birth_city",$cName]);//使用
                }
            ]);
        }else{
            $query = User::find()->with("userInfo")->where($where);
        }

        $pages = new Pagination(["totalCount" =>$query->count(), "pageSize" => PAGE_NUM]);
        $data["data"] = $query->offset($pages->offset)
            ->orderBy($order)
            ->limit($pages->limit)
            ->all();
        $data["pages"]=$pages;
        return $data;
    }